Distribution.—Guiana.
IV. THE REED TITI. CALLITHRIX CINERASCENS.
Callithrix cinerascens, Spix, Sim. et Vespert. Bras., p. 20, pl. 14 (1823).
Callithrix donacophilus, d'Orb., Voy. Amér. Sud, iv., p. 10, pl. 5 (1826); Gray, Cat. Monkeys Brit. Mus., p. 55 (1870).
Callithrix donacophila, Geoffr., Cat. Méth. Primates, p. 41 (1851); Schl., Mus. Pays Bas, vii., p. 240 (1876).
Characters.—Fur long and similar in character to that of C. torquata; chest and under side of body pale grey or dark reddish-grey; hands and feet grey; back of the same colour; tail mottled grey,—the hairs being grey, with black tips.
In some species the fur varies from dark grey washed with rufous, to almost white, the red wash, where it occurs, sometimes deepening, or almost vanishing.
Distribution.—Mr. Bates observed this species at Serra dos Parentins, in the Lower Amazon Region above the confluence of the Tapajos with the Amazon. It also extends to Bolivia and Peru.
V. THE ORABASSU TITI. CALLITHRIX MOLOCH.
Cebus moloch, Hoffman, Mag. Gesell. Berlin, x., p. 97 (1807).